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Percentage Calculator
What % is A of B?
① Find the percentage (enter A as the part, B as the whole)
② Find the whole (enter A as the part, B as the percentage)
③ Find the part (enter A as the whole, B as the percentage)
What is B% of A?
① Find the value (enter A as the base, B as the percentage)
② Find the percentage (enter A as the base, B as the value)
③ Find the base (enter A as the percentage, B as the value)
Calculate % Change
① Find % change (enter original value A and new value B)
② Find original value (enter % change A and new value B)
③ Find new value (enter original A and % change B)
How to Use
Click the purple result box to copy the value to your clipboard.
Tab 1 “What % is A of B?”
① Find the percentage
Ex: 12 out of 40 students passed → 12 is 30% of 40
② Find the whole
Ex: Sales of 3M equal 60% of total → Total is 5M
③ Find the part
Ex: 30% of 1,000 → 300
Tab 2 “What is B% of A?”
① Find the value
Ex: 8% tax on 5,000 → 400
② Find the percentage
Ex: What % of 2,000 is 600? → 30%
③ Find the base
Ex: If 30% equals 600, the base is → 2,000
Tab 3 “Calculate % Change”
① Find % change
Ex: Price went from 100 to 120 → +20% (positive = increase, negative = decrease)
② Find original value
Ex: A 20% increase results in 120 → Original was 100
③ Find new value
Ex: 100 increased by 20% → 120